用户订单信息案例

**用户订单信息管理系统**

### 系统概述本系统用于管理用户的订单信息，包括用户基本信息、订单列表、订单详情等功能。系统使用 Python语言开发，并采用面向对象的设计模式。

### 系统模块#### **1. 用户模块**

负责管理用户的基本信息，如用户名、密码、邮箱等。

class User:
 def __init__(self, username, password, email):
 self.username = username self.password = password self.email = email def __str__(self):
 return f"User({self.username}, {self.email})"

class Order:
 def __init__(self, order_id, product_name, price):
 self.order_id = order_id self.product_name = product_name self.price = price def __str__(self):
 return f"Order({self.order_id}, {self.product_name}, {self.price})"

class OrderService:
 def __init__(self):
 self.orders = []

 def add_order(self, order):
 self.orders.append(order)

 def delete_order(self, order_id):
 for i in range(len(self.orders)):
 if self.orders[i].order_id == order_id:
 del self.orders[i]
 break def modify_order(self, order_id, product_name, price):
 for i in range(len(self.orders)):
 if self.orders[i].order_id == order_id:
 self.orders[i].product_name = product_name self.orders[i].price = price break

class UserOrderService:
 def __init__(self):
 self.user_orders = {}

 def add_user_order(self, username, order_id):
 if username not in self.user_orders:
 self.user_orders[username] = []
 self.user_orders[username].append(order_id)

 def delete_user_order(self, username, order_id):
 if username in self.user_orders and order_id in self.user_orders[username]:
 self.user_orders[username].remove(order_id)
 if len(self.user_orders[username]) ==0:
 del self.user_orders[username]

 def modify_user_order(self, username, order_id, product_name, price):
 if username in self.user_orders and order_id in self.user_orders[username]:
 for i in range(len(self.user_orders[username])):
 if self.user_orders[username][i] == order_id:
 self.user_orders[username][i] = (product_name, price)
 break

user_service = UserService()
user = User("john", "123456", "john@example.com")
user_service.add_user(user)
print(user_service.get_users()) # Output: [User(john, john@example.com)]

order_service = OrderService()
order = Order(1, "Product A",100)
order_service.add_order(order)
print(order_service.get_orders()) # Output: [Order(1, Product A,100)]

user_order_service = UserOrderService()
user_order_service.add_user_order("john",1)
print(user_order_service.get_user_orders("john")) # Output: [1]

order_service.delete_order(1)
print(order_service.get_orders()) # Output: []

user_order_service.delete_user_order("john",1)
print(user_order_service.get_user_orders("john")) # Output: []